Hi, It's the 2000 Mazda MPV, over 200K miles now. Temp dropped to below 30 in the morning, drove to work, no problem. Car was parked for the morning, and at noon, went to start the car to drive to lunch, when the misfire happened.
Code is P0301, Cyl #1 misfire. I took a close look at the freeze frame, here is what I see:
Fuel Sys 1: CL
Fuel Sys 2: OL-Fault
...
STFT B1: -25.0
LTFT B1" -1.5
STFT B2: 0
LTFT B2: -0.7
Eng RPM: 1493
Veh Speed: 0
See picture of the definition of the engine (Duratec V6 2.5L) below. Questions I have:
1. why is bank1 in close loop while bank 2 in open loop?
2. if bank2 has fault on O2 sensor, why is cyl#1 (which is on bank1) misfiring?
Thanks,
Code is P0301, Cyl #1 misfire. I took a close look at the freeze frame, here is what I see:
Fuel Sys 1: CL
Fuel Sys 2: OL-Fault
...
STFT B1: -25.0
LTFT B1" -1.5
STFT B2: 0
LTFT B2: -0.7
Eng RPM: 1493
Veh Speed: 0
See picture of the definition of the engine (Duratec V6 2.5L) below. Questions I have:
1. why is bank1 in close loop while bank 2 in open loop?
2. if bank2 has fault on O2 sensor, why is cyl#1 (which is on bank1) misfiring?
Thanks,
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